No it doesn't. Its thicker than both the air and pro. I learned that today when I was looking for cases for my new iPad. I read on this article that they are still making the cases for it so it should be coming out soon.

There is no Smart Case for the iPad mini 4. Instead Apple decided to go with a 2 piece design for those who don't want a back portion or those who don't want a front portion. This also allows them to keep the Smart Cover design while also creating a more mobile-friendly, easier to grip, and more durable Silicone back piece. There will almost certainly not be a Leather Smart Case release for the iPad mini 4.

I have the Wi-Fi + Cellular iPad mini 4. Its "naked" dimensions are slightly different than the Wi-Fi only version. However, I don't think this makes any difference when it's "wearing" a case and Smart Cover. I'd like to know how much length, width, and depth are added by these accessories because I'm going to order a custom sleeve. The sleeve for my old iPad mini 2 is too small. Apparently the iPad mini 4 is a little taller than the 2.